So we know you should never give the fae or fairyfolk your true name, but which of Merlins would be his true name, Merlin or Emrys? the one his mother gave him, or the name the prophecies gave him?

Hi

I'm looking for a specific fanfic on AO3. It's Merlin who's getting his dragonlord powers. Gaius tells Arthur Merlin has been cursed and needs physical contact. There was a misunderstanding and then the climax was Arthur forcing his way into Merlin's room which activates his possessive nature entirely.

Please it's been driving me mad cus I can't find it